231331430413 has 2 divisors, whose sum is σ = 231331430414. Its totient is φ = 231331430412.

The previous prime is 231331430411. The next prime is 231331430437. The reversal of 231331430413 is 314034133132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179439501609 + 51891928804 = 423603^2 + 227798^2 .

It is a cyclic number.

It is not a de Polignac number, because 231331430413 - 2¹ = 231331430411 is a prime.

It is a super-2 number, since 2×231331430413² (a number of 24 digits) contains 22 as substring.

Together with 231331430411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231331430411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115665715206 + 115665715207.

It is an arithmetic number, because the mean of its divisors is an integer number (115665715207).

Almost surely, 2^231331430413 is an apocalyptic number.

It is an amenable number.

231331430413 is a deficient number, since it is larger than the sum of its proper divisors (1).

231331430413 is an equidigital number, since it uses as much as digits as its factorization.

231331430413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 231331430413 its reverse (314034133132), we get a palindrome (545365563545).

The spelling of 231331430413 in words is "two hundred thirty-one billion, three hundred thirty-one million, four hundred thirty thousand, four hundred thirteen".